JavaPerformanceTuning/JStack/src/net/sdo/ParseJStack.java at master · ishara/JavaPerformanceTuning · GitHub

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package net.sdo;

import java.util.*;

import java.io.*;

/**

* Parse output from jstack to provide a snapshot of where threads

* are running or blocked.

* usage: java ParseJStack [ -name threadname ] file1 [file2 ...]

* The list of files should be from one or more JDK 6 jstack commands.

* The threadname can be used to restrict output to threads that match a

* particular pattern. For example, for glassfish you can say

* -name thread-pool-1 to get all threads in the default ORB threadpool.

* TODO: this should use regular expression pattern matching; right

* now it simply uses substring matching (indexOf).

public class ParseJStack {

static class HashMapValueComparator implements Comparator {

HashMap<String, Integer> hm;

public HashMapValueComparator(HashMap<String, Integer> hm) {

this.hm = hm;

}

public int compare(Object o1, Object o2) {

String s1 = (String) o1;

String s2 = (String) o2;

int i1 = hm.get(s1).intValue();

int i2 = hm.get(s2).intValue();

if (i1 == i2)

return s1.compareTo(s2);

return i2 - i1;

}

public boolean equals(Object o) {

// Not for the general case, but for now...

return hm == o;

}

private static Map<String, Integer>

getSortedMap(HashMap<String, Integer> hm) {

TreeMap<String, Integer> tm =

new TreeMap<String, Integer>(new HashMapValueComparator(hm));

Iterator<String> keys = hm.keySet().iterator();

while (keys.hasNext()) {

String s = keys.next();

tm.put(s, hm.get(s));

}

return tm;

}

private static void printTable(HashMap<String, Integer> hm, String title) {

String s;

Map<String, Integer> table = getSortedMap(hm);

Iterator<String> keys = table.keySet().iterator();

System.out.println("Threads in state " + title);

int total = 0;

while (keys.hasNext()) {

s = keys.next();

Integer i = table.get(s);

total += i;

System.out.println("\t" + i + " threads running in " + s);

}

System.out.println("Total " + title + " Threads: " + total);

System.out.println("");

}

private static class JStackParser {

private BufferedReader br;

private int lineNo = 0;

private int vmThreads = 0;

private String curMethodLine;

private StringTokenizer threadTokenizer;

private String fname;

private boolean peeked = false;

public JStackParser(String fname) throws IOException {

this.fname = fname;

br = new BufferedReader(new FileReader(fname));

}

public void close() throws IOException {

br.close();

lineNo = 0;

vmThreads = 0;

threadTokenizer = null;

fname = null;

peeked = false;

}

public String getNextThread() throws IOException {

peeked = false;

String s = br.readLine();

lineNo++;

while (s != null) {

if (!(s.startsWith("\""))) {

s = br.readLine();

lineNo++;

continue;

}

if (s.startsWith("\"Concurrent Mark-Sweep GC Thread")) {

s = br.readLine();

lineNo++;

vmThreads++;

continue;

}

if (s.startsWith("\"G1")) {

s = br.readLine();

lineNo++;

vmThreads++;

continue;

}

if (restrictThreads && s.indexOf(threadName) < 0) {

s = br.readLine();

lineNo++;

continue;

}

s = br.readLine();

lineNo++;

if (s.equals("")) {

vmThreads++;

continue;

}

break;

}

if (s == null)

return null;

threadTokenizer = new StringTokenizer(s);

threadTokenizer.nextToken(); // java.lang.Thread.State:

return threadTokenizer.nextToken(); // BLOCKED, etc.

}

public String peekCurrentMethod() throws IOException {

curMethodLine = br.readLine();

lineNo++;

peeked = true;

if (curMethodLine.equals(""))

vmThreads++;

return curMethodLine;

}

public String getThreadSubState() {

return threadTokenizer.nextToken();

}

public void insertJavaMethod(HashMap<String, Integer>curTable,

int skipLines) throws IOException {

for (int i = (peeked) ? 1 : 0; i < skipLines; i++) {

curMethodLine = br.readLine();

}

lineNo += skipLines;

if (peeked) {

lineNo--;

peeked = false;

}

updateTable(curTable, curMethodLine);

}

public void insertJavaMethod(HashMap<String, Integer>curTable,

boolean skip) throws IOException {

if (!peeked) {

curMethodLine = br.readLine();

lineNo++;

}

else peeked = false;

if (curMethodLine.equals("")) {

vmThreads++;

return;

}

if (skip)

skipJavaClasses();

updateTable(curTable, curMethodLine);

}

private void skipJavaClasses() throws IOException {

do {

curMethodLine = br.readLine();

lineNo++;

if (curMethodLine.equals(""))

break;

} while ((curMethodLine.indexOf("at java.") > 0) ||

(curMethodLine.indexOf("at ") < 0) ||

(curMethodLine.indexOf("at sun.") > 0));

}

private void updateTable(HashMap<String, Integer> table,

String methodString) {

StringTokenizer tok = new StringTokenizer(methodString);

String method = null;

try {

tok.nextToken(); // at

method = tok.nextToken();

} catch (NoSuchElementException nsee) {

method = "System Thread";

}

Integer i = (Integer) table.get(method);

if (i == null)

i = new Integer(1);

else i = new Integer(i.intValue() + 1);

table.put(method, i);

}

public int getVMThreads() {

return vmThreads;

}

public String toString() {

return "parsing file " + fname + " at line " + lineNo;

}

private static String threadName = null;

private static boolean restrictThreads = false;

public static void main(String[] args) throws Exception {

int arg;

int vmThreads = 0;

for (arg = 0; arg < args.length; arg++) {

if (!args[arg].startsWith("-"))

break;

if (args[arg].equals("-name")) {

restrictThreads = true;

threadName = args[++arg];

continue;

}

System.out.println(

"usage: java ParseJStack [-name threadname] file1 ...");

System.exit(-1);

}

HashMap<String, Integer> waitingThreads = new HashMap<String, Integer>();

HashMap<String, Integer> sleepingThreads = new HashMap<String, Integer>();

HashMap<String, Integer> runningThreads = new HashMap<String, Integer>();

HashMap<String, Integer> ioReadThreads = new HashMap<String, Integer>();

HashMap<String, Integer> ioPollThreads = new HashMap<String, Integer>();

HashMap<String, Integer> ioAcceptThreads = new HashMap<String, Integer>();

HashMap<String, Integer> blockedThreads = new HashMap<String, Integer>();

HashMap<String, Integer> unknownThreads = new HashMap<String, Integer>();

while (arg < args.length) {

JStackParser jsp = new JStackParser(args[arg]);

try {

String state = jsp.getNextThread();

while (state != null) {

if (state.equals("BLOCKED")) {

jsp.insertJavaMethod(blockedThreads, true);

}

else if (state.equals("TIMED_WAITING")) {

String subState = jsp.getThreadSubState();

if (subState.equals("(on")) { // )

jsp.insertJavaMethod(waitingThreads, 2);

}

else if (subState.equals("(parking)")) {

jsp.insertJavaMethod(waitingThreads, true);

}

else if (subState.equals("(sleeping)")) {

jsp.insertJavaMethod(sleepingThreads, 2);

}

else {

throw new IllegalStateException(

"Unknown thread substate while " + jsp);

}

else if (state.equals("WAITING")) {

String subState = jsp.getThreadSubState();

if (subState.equals("(parking)")) {

jsp.insertJavaMethod(blockedThreads, true);

}

else if (subState.equals("(on")) { // )

jsp.insertJavaMethod(waitingThreads, 2);

}

else {

throw new IllegalStateException(

"Unknown thread substate while " + jsp);

}

else if (state.equals("RUNNABLE")) {

String s = jsp.peekCurrentMethod();

if (s.equals("")) {

// VM thread; just get next one

} else if (s.indexOf("socketRead0") > 0) {

jsp.insertJavaMethod(ioReadThreads, true);

} else if (s.indexOf("poll0") > 0) {

jsp.insertJavaMethod(ioPollThreads, true);

} else if (s.indexOf("epollWait") > 0) {

jsp.insertJavaMethod(ioPollThreads, true);

} else if (s.indexOf("socketAccept") > 0) {

jsp.insertJavaMethod(ioAcceptThreads, true);

} else {

jsp.insertJavaMethod(runningThreads, false);

}

else throw new IllegalStateException(

"Unknown thread state " + state + " while " + jsp);

state = jsp.getNextThread();

}

vmThreads += jsp.getVMThreads();

jsp.close();

arg++;

} catch (Exception e) {

System.out.println("Exception while " + jsp);

e.printStackTrace();

System.exit(-1);

}

printTable(runningThreads, "Running");

printTable(blockedThreads, "Blocked by Locks");

printTable(waitingThreads, "Waiting for notify");

printTable(ioReadThreads, "Waiting for I/O read");

printTable(ioAcceptThreads, "Waiting for I/O accept");

printTable(ioPollThreads, "Polling");

printTable(sleepingThreads, "Sleeping");

printTable(unknownThreads, "Unknown (system)");

System.out.println("Total # of VM threads: " + vmThreads);

}

JavaPerformanceTuning/JStack/src/net/sdo/ParseJStack.java at master · ishara/JavaPerformanceTuning · GitHub

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